To facilitate quick selection for engineers, this article provides a systematic overview of NIDEC's mainstream stepper linear motor offerings for design reference.
Part I: Through-Shaft Stepper Linear Motors: NIDEC SPS10 / SPS20 Series
| Parameter | SPS10 | SPS20 |
|---|---|---|
| Frame Size | Φ10 class | Φ20 class |
| Phases / Excitation | 2-phase bipolar / 2-phase EX | 4-phase unipolar / 2-phase EX |
| Winding Resistance | 22 Ω | 20 / 68 / 150 Ω |
| Lead Screw Pitch | 0.4 mm | 0.5 mm |
| Linear Step Resolution | 20 μm | 25 μm |
| Thrust (ref) | 0.98 N (≈100 gf) | 7.85 N (≈800 gf) |
| Permissible Thrust | 4.9 N | 49 N |
| Effective Stroke | 7 mm (-1003: 10 mm) | 10 mm |
| Mechanical Stroke | 8 mm (-1003: 11 mm) | 12 mm |
| Mass | ≈6 g | ≈45 g |
| Operating Temp. | 0–50 ℃ | 0–50 ℃ |
| Termination | Lead wires | J.S.T. ZHR-6 type connector |
| Features | Most compact in SPS family | High thrust, continuous 1–5 W |
Performance Curves: SPS10 Series
Performance Curves: SPS20 Series
Part II: Fixed-Shaft Stepper Linear Motors: LPD4R5SG-005 / MSEV020W02
| Parameter | LPD4R5SG-005 | MSEV020W02 |
|---|---|---|
| Frame Size | Φ4.5 | Φ20 |
| Phases / Excitation | 2-phase bipolar / 2-phase constant voltage | 2-phase / 1-2 phase excitation |
| Gear Ratio | 1/20.25 | -- |
| Winding Resistance | 14 Ω ±10% | 60 ±6 Ω |
| Lead Screw Pitch | -- | 0.4 mm |
| Linear Step Resolution | 0.0072 mm/step (calculated) | 10 μm/step |
| Thrust | ≥3.43 N (350 gf) | 1.2 N (120 gf), calculated |
| Rated / Operating Voltage | 5.0 / 3.0–5.0 V | 5.0 V |
| Mass | ≈2.6 g | ≈4.5 g |
| Termination | FPC | Lead wires (see Fig.1 drive circuit) |
Performance Curves: LPD4R5SG-005
Performance Curves: MSEV020W02
Note: The MSEV020W02 curves above represent the motor body only. When estimating shaft thrust, convert using the formula: Thrust P = 2π n T / L where n= efficiency factor, T= motor torque, L= lead screw pitch.
Product Photos:
